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为研究高能微波(HPM)传播降雨衰减问题,运用均匀随机概率排列雨滴建立一种新型简单的3维时域有限差分(FDTD)模型,并通过耦合小型机箱侧缝进行仿真计算。结果表明,模型能够实时有效反映雨降在HPM耦合过程中的影响规律,降雨能抑制耦合过程中的频谱分离,能量衰减随降雨区域在传播方向上增大而增加。
In order to study the rainfall attenuation problem of high energy microwave (HPM) propagation, a new simple 3-D finite-difference time-domain (FDTD) model was established by using uniform random probability raindrops and simulated by coupling the side-seam of a small chassis. The results show that the model can effectively reflect the influence of rain drop in HPM coupling process in real time. Rainfall can restrain the spectral separation in the coupling process. The energy attenuation increases with the increase of rainfall area in the propagation direction.